• Brand: Sierra
• Condition: New
• MPN: GB450032193

Part number 18-2201

Sierra Upper Unit Gear Set

Replaces Mercury Mercruiser 43-18411A2, 43-18410A2.

For most V-8 engines. Fits R/MR/Alpha One and Gen II models 1983-1997.

1.5:1 Ratio; drive gear=22 teeth, driven gear=20 teeth. Includes bearing.

New factory part but may have some storage wear.

The following Mercruiser sterndrives use this gear set.

ALPHA ONE (GEN.II) 1991-1995 0D469859 THRU 0F679999 (MERCRUISER)
ALPHA ONE (GEN.II) 1996-1997 0F680000 THRU 0K999999 (MERCRUISER)
R/MR/ALPHA ONE (Sterndrive) 1983-1990 6225577 THRU 0D469858 (MERCRUISER)
R/MR/ALPHA ONE (Transom Assembly) 1983-1990 6216687 THRU 0D469858 (MERCRUISER).